In recent years, there has been a lot of interest in Mobile Ad hoc Networks (MANET). Mobile ad hoc networks are groups of mobile nodes. These nodes send and receive messages, and can communicate with each other. Thus, the network builds its own network structure, that is not dependent on the infrastructure central administration. MANET has been used in environments of poor communication, such as those in which the infrastructure cannot be built like, disaster areas, and war zones. In addition to its key characteristics, MANET node contains various attribute information, such as mobility, velocity, and energy. However, the MANET has constraints, such as transmission band and energy consumption. These constraints cause disconnections between the nodes and rerouting. Most of the researchers in MANET focus on the clustering based routing protocol which can sufficiently enhance performance, scalability, and energy efficiency of sufficient routing protocol for mobile adhoc network. In this paper, performance analysis of cluster based energy efficient routing protocols such as Low Energy Adaptive Clustering Hierarchy (LEACH) and Hybrid Energy – Efficient Distributed (HEED) protocols has been carried out for MANET through network simulation. The HEED protocol provided better performance compared to LEACH protocol and also increased throughput with number of nodes, transmission range, and mobility.